If you find the device makes some abnormal noise, it could come from several parts. Try methods below to rule out first.
1. Let robot run without main brush or its cover to see if noise still exists. If noise comes from brush, you may refer to video in link below to clean it.
If you find the device makes some abnormal noise, it could come from several parts. Try methods below to rule out first.
1. Let robot run without main brush or its cover to see if noise still exists. If noise comes from brush, you may refer to video in link below to clean it.
https://drive.google.com/open?id=16OqT3K77eHGso0-455Mgg1z_LBMFrDX2
2. Use a screw to uninstall the side brush and run device without it to see if noise still exists.
3. For model S5 max and S6, try to install front wheel referring to attached video; for other models, use hands to uninstall front wheel.
Let robot run without front wheel to check if noise is gone. If noise comes from front wheel, you could refer to video in link below to clean it and try to drip oil into the inside of wheel. https://drive.google.com/open?id=1t3NM5udCZA6Z2Bro9tlwUK8SWeL4u0_Z
4. Press and spin two wheels like the attached picture to see if there is any noise.
5. Clean the filter and change suction mode to lowest quiet mode.